CN209838390U - Oil well produced liquid near centralized processing system - Google Patents
Oil well produced liquid near centralized processing system Download PDFInfo
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- CN209838390U CN209838390U CN201920287152.2U CN201920287152U CN209838390U CN 209838390 U CN209838390 U CN 209838390U CN 201920287152 U CN201920287152 U CN 201920287152U CN 209838390 U CN209838390 U CN 209838390U
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- 239000007788 liquid Substances 0.000 title claims abstract description 108
- 239000003129 oil well Substances 0.000 title claims abstract description 20
- 238000012545 processing Methods 0.000 title abstract description 13
- 239000003921 oil Substances 0.000 claims abstract description 83
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 238000004581 coalescence Methods 0.000 claims abstract description 26
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 239000010779 crude oil Substances 0.000 claims abstract description 13
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003345 natural gas Substances 0.000 claims abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 14
- 239000010935 stainless steel Substances 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 3
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 239000007789 gas Substances 0.000 abstract description 13
- 239000010865 sewage Substances 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model relates to a local centralized processing system of oil well produced liquid especially is suitable for and uses at offshore oil production platform, encrypted well region and cluster well group, makes the produced liquid carry out gas, branch processing such as water nearby. The system comprises a rotational flow gas-liquid separator, an oil-water separator, a rotational flow oil remover, a coalescence settling tank, a pressure stabilizing buffer tank, a water injection pump and a booster pump; the gas outlet of the rotational flow gas-liquid separator is connected with a natural gas outward pipeline, the liquid outlet of the rotational flow gas-liquid separator is sequentially connected with an oil-water separator, a rotational flow oil remover, a coalescence settling tank, a pressure stabilizing buffer tank and a water injection pump in series by using pipelines, the oil outlet of the oil-water separator is connected with a crude oil outward pipeline, and the oil outlet of the rotational flow oil remover and the oil outlet of the coalescence settling tank are connected in parallel on a boosting oil pipeline and are sequentially connected with a booster pump and the crude oil outward pipeline. The investment of offshore and onshore gathering and transportation pipe networks and the energy consumption of sewage transportation are reduced, the environmental protection risk is reduced, the production cost is reduced, and the economic benefit is improved.
Description
Technical Field
The utility model belongs to the processing facility of oil industry oil well produced liquid, especially a processing system is concentrated nearby to oil well produced liquid is particularly suitable for using at offshore oil production platform, encrypted well region and cluster well group, makes the produced liquid divide gas, divide processing such as water nearby.
Background
Along with the development process of the oil field, at present, most of domestic oil fields enter a high water content period, the specific gravity of produced water in produced liquid is higher and higher, the treatment load of an oil field ground system is increased, the treatment cost is increased, and the development benefit of the oil field is gradually reduced.
Taking offshore oil production as an example, at present, offshore produced liquid is generally provided with a two-stage or three-stage station distribution process, the first stage is an oil production platform, and an oil production well produces crude oil; the second stage is a central platform, each oil production platform conveys and collects the produced liquid to a centralized treatment station of the central platform to carry out produced liquid water diversion, crude oil dehydration and sewage treatment, and the treated sewage is returned to the oil production platform to be injected into an oil layer. And a third-stage station distribution process is adopted in part of offshore oil fields, namely, a centralized treatment station of an offshore central platform conveys the low-water-content produced liquid to an onshore terminal treatment station for treatment, and the treated sewage is returned to the offshore oil production platform and injected into an oil layer. A large amount of produced water makes a round trip to carry between offshore oil production platform, offshore center platform centralized processing station, land terminal processing station, carries out every grade and carries all to need the pressure boost, carries the energy consumption height, and the environmental protection risk is big.
Chinese patent 'a short-flow water treatment facilities that divides in advance of oil field produced liquid' patent application number 201610944705.8 discloses a short-flow water treatment facilities that divides in advance of oil field produced liquid, and the device has better minute water, desanding effect that has adopted the process units that swirler series connection, ladder venturi tube, gas-liquid sand separator combination. However, the device is only a water pre-distribution device for produced water, the treated water quality cannot reach the reinjection index of an oil field, and meanwhile, the device is lack of a water injection facility and cannot realize the nearby treatment of the produced water reaching the standard and reinjecting an oil layer.
If the offshore oil production platform can carry out nearby water diversion and reinjection, the energy consumption cost of sewage back and forth conveying is greatly reduced, and the loads of a gathering and transportation pipe network and a centralized treatment station are effectively reduced.
Disclosure of Invention
An object of the utility model is to above-mentioned demand and provide an oil well produced liquid centralized processing system nearby, can divide gas, divide water, water treatment and the processing work of reinjection oil reservoir to the produced liquid of oil well among offshore oil production platform, the encryption well region and cluster well group, shorten the processing and the reinjection flow of produced liquid, reduce equipment area, realize produced liquid and divide gas, divide water, water treatment and reinjection nearby, reduction in production cost.
In order to achieve the above purpose, the technical solution of the present invention is realized as follows: a near centralized treatment system for oil well produced liquid comprises a rotational flow gas-liquid separator, an oil-water separator, a rotational flow oil remover, a coalescence settling tank, a pressure stabilizing buffer tank, a water injection pump and a booster pump; the gas outlet of the rotational flow gas-liquid separator is connected with a natural gas outward pipeline, the liquid outlet of the rotational flow gas-liquid separator is sequentially connected with an oil-water separator, a rotational flow oil remover, a coalescence settling tank, a pressure stabilizing buffer tank and a water injection pump in series by using pipelines, the oil outlet of the oil-water separator is connected with a crude oil outward pipeline, and the oil outlet of the rotational flow oil remover and the oil outlet of the coalescence settling tank are connected in parallel on a boosting oil pipeline and are sequentially connected with a booster pump and the crude oil outward pipeline.
After the technical scheme is adopted, the beneficial effects of the utility model are that: the utility model relates to a can high-efficient, realize oil-water separation, sewage treatment to reach standard and the integration processing system who injects into fast, can realize and accomplish the work of branch gas, branch water, water treatment and reinjection oil reservoir of extraction liquid at offshore oil production platform, encrypted well region and cluster well group, reduce marine and defeated pipe network investment of land collection and sewage transport energy consumption, reduce the environmental protection risk, reduction in production cost improves economic benefits. The concrete points are as follows:
1. the utility model discloses process flow is simple and convenient, and equipment is small, and area is little, can satisfy the operation requirement in the narrow and small space of offshore oil production platform, also can use in the land encryption well region and cluster well group simultaneously. 2. The system is used for treating the oil well produced liquid without using chemical agents, and the treatment cost is low. 3. The system fully utilizes the pressure of the oil extraction wellhead, has closed whole flow, has no pressurization measure in the gas distribution, water distribution and treatment processes, and has low operation energy consumption. 4. The utility model discloses be applied to the nearby gas, the branch of offshore platform oil well production liquid, water treatment and reinjection, handle back water quality index and can reach 5 grades of water injection standards in "piece rock oil reservoir water injection water quality index and analytical method" SY/T5329-2012 recommended index, the production water that has significantly reduced makes a round trip at marine handling cost and risk, has high application prospect.
Drawings
Fig. 1 is a schematic flow and structure diagram of the system.
FIG. 2 is a schematic view of the oil-water separator.
Fig. 3 is a schematic diagram of the structure of the coalescing settling tank.
Fig. 4 is a schematic structural diagram of the surge tank.
Detailed Description
The following detailed description of the present invention, taken in conjunction with the accompanying drawings, is not intended to limit the scope of the invention. It is only following do the preferred embodiment of the utility model, other applications the utility model discloses an equivalent change all should belong to the utility model discloses a protection scope.
Referring to fig. 1, the near centralized treatment system for the oil well produced liquid comprises a cyclone gas-liquid separator 1, an oil-water separator 2, a cyclone oil remover 3, a coalescence settling tank 4, a pressure stabilizing buffer tank 5, a water injection pump 6 and a booster pump 7, and is characterized in that an air outlet of the cyclone gas-liquid separator 1 is connected with a natural gas external transportation pipeline, a liquid outlet of the cyclone gas-liquid separator 1 is sequentially connected with the oil-water separator 2, the cyclone oil remover 3, the coalescence settling tank 4, the pressure stabilizing buffer tank 5 and the water injection pump 6 in series by using pipelines, a separator oil outlet 24 of the oil-water separator 2 is connected with a crude oil external transportation pipeline, and an oil outlet of the cyclone oil remover 3 and a settling tank oil outlet 46 of the coalescence settling tank 4 are connected in parallel on a booster oil transportation pipeline 8 and are sequentially connected with.
And a liquid inlet of the cyclone gas-liquid separator 1 is connected with an oil well produced liquid confluence pipeline.
The water injection pump 6 is connected with a water injection well injection main pipeline.
The cyclone gas-liquid separator 1 is a vertical tank body, a liquid inlet of the cyclone gas-liquid separator is arranged at the upper part of the tank body, a pipeline of the liquid inlet of the cyclone gas-liquid separator 1 inclines downwards to enter the tank body, and an included angle between the pipeline and the tank body is set to be 45-60 degrees.
The separator tank body 23 of the oil-water separator 2 is of a horizontal structure, the separator tank body 23 is internally provided with the separator coalescent filler 22, the separator coalescent filler 22 is a stainless steel corrugated plate which is horizontally stacked, a spacer block is arranged between every two layers of stainless steel corrugated plates, the bottom of the separator coalescent filler 22 is provided with a support rod and a partition plate, the lower end of the support rod is fixed at the bottom of the tank, the partition plate is welded from the lower part of the tank body and forms a closed space with the bottom of the tank, and the separator coalescent filler 22 in the separator tank body 23 is at least provided with two groups. The baffle obstructs the produced fluid so that it must pass through the separator coalescing packing 22, causing the small oil droplets to gradually coalesce into large oil droplets and eventually enter the crude oil export line through the separator oil outlet 24. A separator liquid inlet 21 of the oil-water separator 2 is arranged on one side of the bottom of a separator tank body 23 and is positioned below a first group of separator coalescent fillers 22, a separator oil outlet 24 is arranged at the top of the separator tank body 23, a separator mud bucket 25 and a separator liquid outlet 26 are arranged at the bottom of the separator tank body, and the separator liquid outlet 26 is connected with a liquid inlet of the cyclone oil remover 3 through a pipeline.
The settling tank body 42 of the coalescence settling tank 4 is of a horizontal structure, coalescence filler 44 and sedimentation filler 45 of the settling tank are arranged in the settling tank body 42, the coalescence filler 44 of the settling tank is stainless steel corrugated plates which are horizontally stacked, a spacer block is arranged between every two layers of the stainless steel corrugated plates, a support rod and a partition plate are arranged at the bottom of the coalescence filler 44 of the settling tank, the lower end of the support rod is fixed at the bottom of the tank, and the partition plate is welded from the lower part of the tank body and forms a closed space with the bottom of the; the sedimentation packing 45 is stainless steel corrugated plates which are obliquely stacked, a spacer block is arranged between every two layers of stainless steel corrugated plates, and the horizontal inclination angle of the stainless steel corrugated plates is set to be 50-70 degrees. A settling tank liquid inlet 41 and a settling tank liquid outlet 48 are further arranged on a settling tank body 42 of the coalescence settling tank 4, a settling tank oil outlet 46 is arranged at the top of the settling tank, a settling tank mud bucket 47 is arranged at the bottom of the settling tank, a rectifying plate 43 is arranged inside the settling tank body 42 and between the settling tank liquid inlet 41 and the coalescence packing 44 of the settling tank, and a liquid flow hole or groove is formed in a plate body of the rectifying plate 43, so that liquid entering from the settling tank liquid inlet 41 is buffered. The liquid inlet 41 of the settling tank is connected with the liquid outlet of the cyclone oil remover 3 through a pipeline.
The pressure stabilizing buffer tank 5 is a vertical tank, a water bag 53 is arranged in a buffer tank body 52 of the pressure stabilizing buffer tank 5, an inlet of the water bag 53 is communicated with a three-way pipe at the bottom of the buffer tank body 52, one horizontal end of the three-way pipe is a buffer tank liquid inlet 51, the other horizontal end of the three-way pipe is a buffer tank liquid outlet 55, an air supplementing port 54 and an air exhaust port 56 are arranged at the top of the buffer tank body 52, and the air supplementing port 54 and the air exhaust port 56 are both communicated with a cavity of the pressure stabilizing buffer tank 5 outside the water bag 53. The buffer tank liquid inlet 51 is connected with the settling tank liquid outlet 48 through a pipeline, and the buffer tank liquid outlet 55 is connected with the liquid inlet of the water injection pump 6 through a pipeline. The water bag 53 is filled with liquid, so that the conveying pressure at two ends of the buffer tank liquid inlet 51 and the buffer tank liquid outlet 55 can be balanced.
The oil-gas mixed liquid at the oil extraction well head is obliquely cut into the tank body of the rotational flow gas-liquid separator 1 through the liquid inlet of the rotational flow gas-liquid separator 1, gas-liquid separation is realized in the rotational flow gas-liquid separator 1, the gas is connected into a natural gas outward pipeline under pressure from the gas outlet at the top, and the oil-water mixed liquid after gas separation is discharged from the liquid outlet at the bottom of the rotational flow gas-liquid separator 1.
The liquid outlet of the cyclone gas-liquid separator 1 is connected with the separator liquid inlet 21 of the oil-water separator 2, after oil-water separation is completed in the oil-water separator 2, oil is connected into a crude oil output pipeline under pressure from the separator oil outlet 24 at the top, and separated produced water is discharged from the separator liquid outlet 26 at the bottom.
The separator liquid outlet 26 of the oil-water separator 2 is connected with the liquid inlet of the cyclone oil eliminator 3, after oil and water are separated in the cyclone oil eliminator 3, the oil is discharged from the oil outlet at the top of the cyclone oil eliminator 3 and is connected with the liquid inlet of the booster pump 7 through the booster oil pipeline 8, the oil is pressurized by the booster pump 7 and then is connected into the crude oil output pipeline, and the produced water after oil removal is discharged from the liquid outlet of the cyclone oil eliminator 3.
The liquid outlet of the cyclone oil remover 3 is connected with the liquid inlet 41 of the settling tank of the coalescence settling tank 4, the liquid is subjected to three-phase separation of oil, water and solid impurities in the coalescence settling tank 4, and the separated crude oil enters the pressurization oil pipeline 8 and the pressurization pump 7 after being discharged from the oil outlet 46 of the settling tank at the top, and is connected to the crude oil output pipeline after being pressurized by the pressurization pump 7. The settling tank liquid outlet 48 of the coalescence settling tank 4 discharges the purified produced water, and the water quality index of the produced water reaches the standard of 25mg/L of oil content, 23mg/L of suspended matter content and 3.8 mu m of median particle size.
The settling cask liquid outlet 48 of coalescence settling cask 4 links to each other with the buffer tank inlet 51 of steady voltage buffer tank 5, and steady voltage buffer tank 5 plays the cushioning effect to delivery pressure, and the inlet and the buffer tank liquid outlet 55 of water injection pump 6 are connected, pours into the underground oil reservoir into after the produced water pressure boost after will handling through water injection pump 6.
The embodiments described above are merely exemplary embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and teaching of the present invention. Many variations, combinations, and modifications of the aspects disclosed herein are possible and are within the scope of the invention, which is, therefore, not to be limited by the above description.
Claims (7)
1. The near centralized treatment system for the oil well produced liquid comprises a rotational flow gas-liquid separator, an oil-water separator, a rotational flow oil remover, a coalescence settling tank, a pressure stabilizing buffer tank, a water injection pump and a booster pump, and is characterized in that an air outlet of the rotational flow gas-liquid separator is connected with a natural gas outward transmission pipeline, a liquid outlet of the rotational flow gas-liquid separator is sequentially connected with the oil-water separator, the rotational flow oil remover, the coalescence settling tank, the pressure stabilizing buffer tank and the water injection pump in series by using pipelines, an oil outlet of the oil-water separator is connected with a crude oil outward transmission pipeline, and an oil outlet of the rotational flow oil remover and an oil outlet of the coalescence settling tank are connected in parallel on the booster oil transmission pipeline and are sequentially connected.
2. The near-centralized treatment system for the oil well produced liquid, as recited in claim 1, wherein the liquid inlet of the cyclone gas-liquid separator is connected with a confluence pipeline of the oil well produced liquid.
3. The near-centralized treatment system for oil well produced fluid according to claim 1, wherein the water injection pump is connected with an injection main pipeline of the water injection well.
4. The near centralized treatment system for the oil well produced liquid as claimed in claim 2, wherein the cyclone gas-liquid separator is a vertical tank body, the liquid inlet of the cyclone gas-liquid separator is arranged at the upper part of the tank body, a pipeline of the liquid inlet of the cyclone gas-liquid separator is inclined downwards to enter the tank body, and the included angle between the pipeline and the tank body is set to be 45-60 degrees.
5. The system for the near centralized treatment of the produced liquid of the oil well as defined in claim 1, wherein the separator tank body of the oil-water separator is a horizontal structure, the separator tank body is internally provided with the separator coalescent filler which is stainless steel corrugated plates horizontally stacked, a spacer block is arranged between each layer of the stainless steel corrugated plates, the bottom of the separator coalescent filler is provided with a support rod and a partition plate, the lower end of the support rod is fixed at the bottom of the tank, the partition plate is welded from the lower part of the tank body and forms a closed space with the bottom of the tank, and at least two groups of the separator coalescent fillers are arranged in the separator tank body.
6. The near centralized treatment system for the oil well produced liquid according to claim 1, wherein the settling tank body of the coalescence settling tank is of a horizontal structure, coalescence packing and sedimentation packing of the settling tank are arranged in the settling tank body, the coalescence packing of the settling tank is stainless steel corrugated plates which are horizontally stacked, a spacer block is arranged between every two layers of stainless steel corrugated plates, a support rod and a partition plate are arranged at the bottom of the coalescence packing of the settling tank, the lower end of the support rod is fixed at the bottom of the tank, and the partition plate is welded from the lower part of the tank body and forms a closed space with the bottom of the tank; the sedimentation filler is stainless steel corrugated plates which are obliquely stacked, a spacer block is arranged between every two layers of stainless steel corrugated plates, and the horizontal inclination angle of the stainless steel corrugated plates is set to be 50-70 degrees.
7. The near centralized treatment system for the oil well produced liquid as claimed in claim 1, wherein the pressure-stabilizing buffer tank is a vertical tank, a water bag is arranged in the buffer tank body of the pressure-stabilizing buffer tank, the inlet of the water bag is communicated with a three-way pipe at the bottom of the buffer tank body, one horizontal end of the three-way pipe is a liquid inlet of the buffer tank, the other horizontal end of the three-way pipe is a liquid outlet of the buffer tank, and the top of the buffer tank body is provided with an air supplementing port and an air exhaust port which are both communicated with the cavity of the pressure-stabilizing buffer tank outside the water bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920287152.2U CN209838390U (en) | 2019-03-07 | 2019-03-07 | Oil well produced liquid near centralized processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920287152.2U CN209838390U (en) | 2019-03-07 | 2019-03-07 | Oil well produced liquid near centralized processing system |
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| Publication Number | Publication Date |
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| CN209838390U true CN209838390U (en) | 2019-12-24 |
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| CN201920287152.2U Expired - Fee Related CN209838390U (en) | 2019-03-07 | 2019-03-07 | Oil well produced liquid near centralized processing system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111484871A (en) * | 2020-05-13 | 2020-08-04 | 森诺科技有限公司 | Multifunctional small circulation swash plate cyclone integrated device |
| CN113311790A (en) * | 2021-05-17 | 2021-08-27 | 四川洵美科技有限公司 | Small intelligent process precise control system |
| CN114146454A (en) * | 2020-09-07 | 2022-03-08 | 中国石油化工股份有限公司 | Online rapid oil-water separation vortex pipeline separation device and separation method |
| CN114412435A (en) * | 2022-03-29 | 2022-04-29 | 四川华气清源科技股份有限公司 | Wellhead separation metering device |
| CN114412538A (en) * | 2021-12-24 | 2022-04-29 | 淮北矿业股份有限公司芦岭煤矿 | A coal seam pressure stabilization water injection system |
| CN115197744A (en) * | 2022-06-28 | 2022-10-18 | 中国矿业大学 | A system for removing water and sand debris from heavy oil on the ground and its oil-water separation method |
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2019
- 2019-03-07 CN CN201920287152.2U patent/CN209838390U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111484871A (en) * | 2020-05-13 | 2020-08-04 | 森诺科技有限公司 | Multifunctional small circulation swash plate cyclone integrated device |
| CN114146454A (en) * | 2020-09-07 | 2022-03-08 | 中国石油化工股份有限公司 | Online rapid oil-water separation vortex pipeline separation device and separation method |
| CN113311790A (en) * | 2021-05-17 | 2021-08-27 | 四川洵美科技有限公司 | Small intelligent process precise control system |
| CN114412538A (en) * | 2021-12-24 | 2022-04-29 | 淮北矿业股份有限公司芦岭煤矿 | A coal seam pressure stabilization water injection system |
| CN114412435A (en) * | 2022-03-29 | 2022-04-29 | 四川华气清源科技股份有限公司 | Wellhead separation metering device |
| CN114412435B (en) * | 2022-03-29 | 2022-07-15 | 四川华气清源科技股份有限公司 | Wellhead separation metering device |
| CN115197744A (en) * | 2022-06-28 | 2022-10-18 | 中国矿业大学 | A system for removing water and sand debris from heavy oil on the ground and its oil-water separation method |
| CN115197744B (en) * | 2022-06-28 | 2023-09-19 | 中国矿业大学 | System for removing water and sand scraps from ground thickened oil and oil-water separation method thereof |
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